html,
body {
/*css for full size background image*/
  background: url(../img/fons_inici.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  
  height: 100%;
  background-color: #fff;
  color: #000;
  text-align: left;
 
}